package com.example.proyectosoftware;

import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.v4.widget.SimpleCursorAdapter;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.app.*;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ListView;
import android.widget.ProgressBar;

public class Consultas extends ListActivity
implements LoaderManager.LoaderCallbacks<Cursor> {

// This is the Adapter being used to display the list's data
SimpleCursorAdapter mAdapter;

// These are the Contacts rows that we will retrieve
static final String[] PROJECTION = new String[] {ContactsContract.Data._ID,
    ContactsContract.Data.DISPLAY_NAME};

// This is the select criteria
static final String SELECTION = "((" + 
    ContactsContract.Data.DISPLAY_NAME + " NOTNULL) AND (" +
    ContactsContract.Data.DISPLAY_NAME + " != '' ))";

@Override
protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	//setContentView(R.layout.activity_main);
	// Create a progress bar to display while the list loads
	ProgressBar progressBar = new ProgressBar(this);
	progressBar.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
	        LayoutParams.WRAP_CONTENT));
	progressBar.setIndeterminate(true);
	getListView().setEmptyView(progressBar);
	
	// Must add the progress bar to the root of the layout
	ViewGroup root = (ViewGroup) findViewById(android.R.id.content);
	root.addView(progressBar);
	
	// For the cursor adapter, specify which columns go into which views
	String[] fromColumns = {ContactsContract.Data.DISPLAY_NAME};
	int[] toViews = {android.R.id.text1}; // The TextView in simple_list_item_1
	
	// Create an empty adapter we will use to display the loaded data.
	// We pass null for the cursor, then update it in onLoadFinished()
			mAdapter = new SimpleCursorAdapter(this, 
	        android.R.layout.simple_list_item_1, null,
	        fromColumns, toViews, 0);
			setListAdapter(mAdapter);
	
	// Prepare the loader.  Either re-connect with an existing one,
	// or start a new one.
		//getLoaderManager().initLoader(0, null, this);
		
	}

private LoaderManager getLoaderManager() {
	// TODO Auto-generated method stub
	return null;
}

// Called when a new Loader needs to be created
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
// Now create and return a CursorLoader that will take care of
// creating a Cursor for the data being displayed.
return new CursorLoader(this, ContactsContract.Data.CONTENT_URI,
        PROJECTION, SELECTION, null, null);
}

// Called when a previously created loader has finished loading
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
// Swap the new cursor in.  (The framework will take care of closing the
// old cursor once we return.)
mAdapter.swapCursor(data);
}

// Called when a previously created loader is reset, making the data unavailable
@Override
public void onLoaderReset(Loader<Cursor> loader) {
// This is called when the last Cursor provided to onLoadFinished()
// above is about to be closed.  We need to make sure we are no
// longer using it.
mAdapter.swapCursor(null);
}

@Override 
public void onListItemClick(ListView l, View v, int position, long id) {
// Do something when a list item is clicked
}

}

